JP2746055B2 - Cable rack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable rack used for installing electric wires.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional cable rack. That is, a pair of side pieces 1a, 1a (one of which is not shown) having bent pieces 2 at both ends in the short direction are passed between the main girder 1 and the side pieces 1a, 1a. A plurality of sub-spars 6 and a metal fitting 17 having a pair of guide pieces 17a, 17a substantially overlapping the bent piece 2 of the side piece 1a and connecting and holding the ends of the plurality of master girders 1 connected in the longitudinal direction. And a bolt 15 and a nut 16 for fixing the joint fitting 17 and the side piece 1a. The side piece 1a and the fitting 17 have an insertion hole 18 for the bolt 15,
Each of the insertion ports 19 is provided.

The connection of the parent girder 1 of the cable rack will be described. First, the longitudinal ends of a plurality of parent girder 1 are connected so as to be continuous. Next, the fitting 17 is connected to the guide piece.
17a is brought into contact with the connecting portion of the main girders 1 so that the 17a overlaps the bent piece 2 of the side piece 1a. And the insertion hole 18, the insertion port
Adjust the position of the fitting 17 in the longitudinal direction so that 19 overlaps, insert the bolt 15 through the insertion hole 18 and the insertion port 19, and tighten the nut.
By screwing 16, a plurality of parent girders 1 can be connected and fixed.

[0004]

However, in the above-mentioned method, the bolt and the nut must be screwed in while holding the joint so as not to come off during the fixing work of the parent girder and the joint by the bolt and the nut. However, there is a problem that workability is poor. Also, screwing only one place with the joint and one main girder, and only one place with the joint and the other main girder does not sufficiently prevent rattling of the main girder. There was a problem that the screwing work was troublesome.

[0005] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a cable rack that can improve the assembly workability.

[0006]

In order to achieve the above object, a cable rack according to the present invention has bent pieces at both ends in a short direction, and cutouts for bolt insertion at both ends in a long direction.
A pair of side girders, each having a pair of locking projections on the inner surface thereof, are opposed to each other, a plurality of sub-girder spanned and attached between the side pieces, and one of the side piece bending pieces. A first metal fitting having a mating engaging portion, a pressing piece for pressing the other bent piece, and a bolt insertion hole for connecting and holding longitudinal ends of a plurality of parent girders; It has a pair of locking pieces to be locked to the stop projections, an insertion hole for bolt insertion, and a current-carrying projection with a knurled end surface, and sandwiches the connecting portion of the parent girder between the first fitting. The second fitting, a bolt having a projection on the seat surface, and a nut having a projection on the seat surface are provided.

[0007]

According to this structure, a pair of side pieces having bent pieces at both ends in the short direction, cutout portions for bolt insertion at both ends in the longitudinal direction, and a pair of locking projections on the inner surface, respectively. , A plurality of sub-spars that are attached across the side pieces, and a pressing piece that presses the engaging portion that engages one bent piece of the side piece and the other bent piece. And a first fitting for connecting and holding the longitudinal ends of the plurality of parent girders to each other, and a pair of locking pieces for locking to the locking projections and a bolt insertion hole. A second fitting which has an insertion opening and a current-carrying projection whose end face is knurled and sandwiches a connection portion between the parent girders between the first fitting and a bolt having a projection on a seat surface; And a nut having a protrusion on the surface, so that the joint between the parent girders can be pressed and gripped by the joint fitting, and screwed Place can also be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Members having the same basic functions as those of the related art are denoted by the same reference numerals. This cable rack includes a main girder 1, a sub girder 6, a first fitting 7, a second fitting 12, a bolt 15 with a projection, and a nut 16 with a projection.

The parent girder 1 comprises a pair of side pieces 1a, 1a facing each other. Side piece 1a is bent at both ends in the transverse direction,
Make The connecting piece 3 for connecting the bent pieces 2 has a convex surface 3a with an intermediate portion in the short direction projecting inward. Notches 4 for inserting bolts are provided at both ends in the longitudinal direction of the convex surface 3a. That is, when the ends of a plurality of parent girders 1 are connected to each other,
An insertion portion is formed. Further, a pair of locking protrusions extending in the longitudinal direction are provided near both ends in the short direction of the convex surface 3a.
5,5 are provided. As a result, a second fitting 12 to be described later is formed.
Can be prevented from rotating around the screw axis.

The sub-spar 6 is substantially U-shaped in cross-section and has a length corresponding to the distance between the side pieces 1a, 1a of the main girder 1, and its end is a bent piece below the side piece 1a. It is placed on 2 and is arranged crosswise with the main girder 1. A plurality of the sub-spars 6 are attached at predetermined intervals in the longitudinal direction. The upper end of child girder 6
The cable laid there is bent so as to be wound inward so as not to be damaged.

The first fitting 7 has a generally U-shaped cross section from a joining piece 8, an engaging piece 9 provided at one end in the short direction and a pressing piece 11 provided at the other end. Then, the ends of the side pieces 1a are connected to each other so as to substantially overlap the side pieces 1a. Patch
8, a bolt 9 insertion hole 9 is provided at the center.

The engaging piece 10 can be locked to one bent piece 2 of the side piece 1a by being formed so that the front end portion is folded inward. The pressing piece 11 is formed to be slightly inclined inward. That is, the length of the distal end portion of the facing piece is shorter than the length of the proximal end portion. The pressing piece 11 is formed such that the fitting 6 is used to connect the engaging piece 10 to one of the bent pieces of the side piece 1a.
2 and overlap with the side piece 1a, the other bent piece 2
Press. By providing the engaging piece 10 and the pressing piece 11 as described above, the joint fitting 6 can grip a connecting portion between the master girders 1. And, by this pressing grip, the parent girder
1 rattling can also be reduced.

The attachment of the first fitting 7 to the side piece 1a will be described. First, the engaging piece 10 is hooked on one bent piece 2 of the side piece 1a. Next, using the hooked part as a fulcrum,
Rotate 6 upward. Then, the pressing piece 11 of the fitting 6
To the other bent piece 2 of the side piece 1a so as to be pushed in. As a result, the pressing piece 11 of the fitting 6 presses the one bent piece 2 of the side piece 1a, while the engaging piece 10 of the fitting 6 is locked to the other bent piece 2 of the side piece 1a. As a result, the metal fitting 6 grips the side piece 1a as a result.

The second fitting 12 is provided with opposite locking pieces 12a, 12a.
a and connecting pieces 12b connecting them. Locking piece 12a,
The length between 12a is slightly longer than the length between the locking projections 5, 5 of the main girder 1. The locking piece 12a is used to attach the second fitting 12 to the main girder.
When attached to 1, it is locked to the locking projection 5 of the main girder 1,
The second fitting 12 is prevented from rotating around the screw axis. The second fitting 12 has a bolt insertion hole 13 at the center of the connecting piece 12b. Further, it has an energizing projection 14 cut and raised on both sides of the insertion opening 13. This energizing protrusion
The end face 14a of 14 is knurled, and the convex face 3a of
And breaks the insulation of the main girder 1. As a result, the second fitting 12 is in an energized state with the master girder 1.

The bolt 15 with a projection is inserted into the insertion opening 13 from the inside of the second fitting 12, and the insertion portion formed by the cutouts 4, 4 of the connecting portion of the parent girder 1 and the insertion of the first fitting 7. Insert the hole. The bolt 15 with projections has a plurality of projections 15 on the seat surface.
a. That is, when the bolt 15 with the projection is tightened, the insulating coating of the second fitting 12 is broken.

The nut 16 with a projection is screwed into the bolt 15 with a projection from outside the first fitting 7. The projection nut 16 has a substantially saw-toothed projection 16a on the seat surface. That is, when the nut 16 with the projection is tightened,
The insulating coating of the first fitting 7 is broken.

The energized state of the main girder 1 and the joint of the cable rack will be described. The first joint 7 and the nut 16 with the projection are energized, and the nut 16 with the projection and the bolt 15 with the projection are energized. . Then, since the bolt 15 with projection and the second fitting 12 are in an energized state, and the second fitting 12 and the parent girder 1 are in an energizing state, the master girder 1, the first fitting 7 and the second jig are eventually turned on. Numeral 12 is in an energized state.

The connection operation of the main girder 1 of the cable rack will be described. First, the ends of the two main girder 1 are connected to each other, and the connection portion is gripped by the first fitting 7. As a result, since the temporary fixing is performed, it is not necessary to hold the first fitting 7 by hand. Next, attach the second fitting 12 to the main girder 1
Contact. Then, the bolt with projection 15 is inserted from the inside, and the nut 16 with the projection is screwed from the outside, so that the parent girder, the first fitting 7 and the second fitting 12 are fixed. In this way, the main girder 1 is gripped by the first metal fitting 7,
The parent girder 1 is sandwiched between the first fitting 7 and the second fitting 12, and
Since only the portions are screwed and firmly connected, the assembly workability is improved.

Note that the second fitting may be slightly curved so as to swell to the side opposite to the contact with the master girder, so that the fixing strength at the time of screwing is improved.

[0020]

The cable rack of the present invention has a pair of bent pieces at both ends in the short direction, notches for bolt insertion at both ends in the long direction, and a pair of locking projections on the inner surface. The side girders oppose each other, a plurality of child girders spanned and mounted between the side girders, and an engaging portion that engages with one of the side gigs and the other bent half are pressed. A first fitting which has a pressing piece to be inserted and an insertion hole for inserting a bolt, and connects and holds longitudinal ends of the plurality of parent girders; and a pair of locking pieces which are locked to the locking projections. A second fitting that has an insertion port for inserting a bolt and an energizing protrusion whose end face is knurled and that holds a connection portion between the parent girders between the first fitting and a bolt that has a projection on a seating surface; And a nut having a projection on the seat surface, so that the joint can press and clamp the connecting portion between the parent girders. Kill. Therefore, it is not necessary to press the joint fitting by hand during the fixing work between the joint fitting and the main girder, and only one screwing point is required, so that the workability of assembly is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing the assembled state.

FIG. 3 is a sectional view showing the assembled state.

FIG. 4 is a perspective view showing the second fitting.

FIG. 5 is a front view showing the projection-provided bolt.

FIG. 6 is a front view showing the nut with projections.

FIG. 7 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Main girder 2 Folded piece 4 Notch 5 Locking projection 6 Child girder 7 First fitting 9 Inserting hole 10 Engagement piece 11 Pressing piece 12 Second fitting 12a Locking piece 13 Insertion port 14 Energizing projection 14a End face of current-carrying protrusion 15 Bolt with protrusion 15a Protrusion of bolt with protrusion 16 Nut with protrusion 16a Protrusion of nut with protrusion

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 63-36121 (JP, U) JP-A 6-44317 (JP, U) JP-A 55-10374 (JP, U) JP-A 1 147612 (JP, U) Japanese Utility Model 4-10514 (JP, U) Japanese Utility Model 56-51414 (JP, U) Japanese Utility Model 63-124020 (JP, U) Japanese Utility Model 63-187521 (JP, U)

Claims (1)

(57) [Claims] 1. A pair of side pieces each having a bent piece at both ends in a short direction, a notch for bolt insertion at both ends in a long direction, and a pair of locking projections on an inner surface. A main girder, a plurality of sub-girder spanned and attached between the side pieces, an engaging portion that engages with one bent piece of the side piece, and a pressing piece and a bolt for pressing the other bent piece. A first fitting having a through hole for connecting and holding longitudinal ends of a plurality of parent girders; a pair of locking pieces for locking to the locking projections; and a bolt insertion hole. A second fitting that has a current-carrying projection whose end face is knurled and sandwiches the connecting portion of the parent girder with the first fitting, a bolt having a projection on the seat surface, and a projection on the seat surface. And a nut having the same.